Does this fix the bug in question or are you just saying a next release has a nightly?

Definitely a relevant question!

As I haven't tested this specific problem (I got bitten by the IE8 CSS problems in 4.2.0 that forced me to move to 4.2.1 nightly fixing it) I guess I am just saying that there's a nightly build to test.
The tooltips do look OK anyway in 4.2.1.